Dodgy roof connector boxes?

[ShaKen]

Hi all,

I decided to pay a visit to the roof today and to inspect the connection boxes preinstalled on the roof for the first time (boxes for Tv, Solar panel cables etc).

I noticed that both of the boxes were cracked; looked like stress fractures to me. I suspect that even if they are not leaking water at present, that they will eventually leak, leading to water penetration to the hab.

What do you think?

 

[mitzimad]

i would leave them if they are not leaking if they were done properly there's a good layer of sealant underneath

 

[Jake Royd]

Some plastics age and become brittle as volatile components are lost coupled with uv degradation.
Looks like a bit of that plus a sideways load on the centre bush, probably in alternating directions.

 

[tacr2man]

The only prob with leaving them is even if they aren't leaking at this moment by the time you realise they are leaking a lot of the damage will already be done . Whereas if you replace them you will know that they are not in a damaged condition to start , and you can verify that no damage has already occurred . JMHO

 

[ShaKen]

The van is a 2018, and purchased new March 2019.
I’m going to raise with dealer as it’s in for some other warranty repair work soon.

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[peterc10]

Looks like the nut inside the moho has been overtightened

 

[tonyidle]

Looks like the nut inside the moho has been overtightened

I use commercially available boxes with a roof spigot but no nut (in fact no thread on the spigot). They have a decent surface area for sealant unlike the traditional mh variety (with no spigot & a narrow peripheral sealing area). The only other thing worth doing is changing the lid screws for stainless if they aren't already. I agree with the over-tightened nut theory especially as there's no need for the nut. Similar to this but mine had a side spigot as well:

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